Problem with RFCOMM/Socket and security
Hello to all!
I'm working with an Embedded System (Arm 9, Linux 2.6.17.3, Uart Bluetooth Module from Bluegiga WT11) with Bluez, but without using /etc/bluetooth/hcid.conf
I'm starting it with
/usr/sbin/hciattach /dev/ttyS1 csr 115200/usr/sbin/hciconfig hci0 up
and can set it up using hciconfig (currently I only set the name)
Now I want to establish a simple RFCOMM-Socket-Connection between two of these systems through
////// Server_sock = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM); loc_addr.rc_family = AF_BLUETOOTH;
loc_addr.rc_bdaddr = *BDADDR_ANY;
loc_addr.rc_channel = (uint8_t) 1;bind(_sock, (struct sockaddr *)&loc_addr, sizeof(loc_addr)); listen(_sock, 1);_clientSock = accept(_sock, (struct sockaddr *)&rem_addr, (socklen_t*)&opt);
Everything works fine!
But now I want to Authenticate and Encrypt this Connection, so I inserted
opt = RFCOMM_LM_AUTH|RFCOMM_LM_ENCRYPT; setsockopt(_sock, SOL_RFCOMM, RFCOMM_LM, &opt, sizeof(opt));
after creating the socket, both on the server and the client, but now the connection cannot be established, of course, the pin is missing but where can I introduce it? I have no hcid.conf, so no pin_helper and so on, is it possible to tell bluez the pin through this programm?
One little other problem:
I have many clients, and I want that only one connection at a time can be established, but when one client is talking to the server, the next client can establish it (connect returns 0) and can send the data, but I don't know who receives the data
Is it possible to reject the connection from the server if he is dealing already a client?
Thank you in advance!
regards,
Hans Juergen
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Quoted 30 lines · Hans Juergen Gamauf
Hello to all!
I'm working with an Embedded System (Arm 9, Linux 2.6.17.3, Uart Bluetooth Module from Bluegiga WT11) with Bluez, but without using
/etc/bluetooth/hcid.conf
I'm starting it with
/usr/sbin/hciattach/dev/ttyS1csr 115200/usr/sbin/hciconfighci0 upand can set it up using hciconfig (currently I only set the name)
Now I want to establish a simple RFCOMM-Socket-Connection between two of these systems through
////// Server
_sock=socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM); loc_addr.rc_family =AF_BLUETOOTH;
loc_addr.rc_bdaddr =*BDADDR_ANY;
loc_addr.rc_channel = (uint8_t) 1;bind(_sock, (struct sockaddr *)&loc_addr, sizeof(loc_addr));listen(_sock, 1);_clientSock=accept(_sock, (struct sockaddr *)&rem_addr, (socklen_t*)&opt);Everything works fine!
But now I want to Authenticate and Encrypt this Connection, so I inserted
Quoted 7 lines
opt = RFCOMM_LM_AUTH|RFCOMM_LM_ENCRYPT;
setsockopt(_sock, SOL_RFCOMM, RFCOMM_LM, &opt, sizeof(opt));after creating the socket, both on the server and the client, but now the connection cannot be established, of course, the pin is missing but where can I introduce it? I have no hcid.conf, so no
pin_helperand so on, is it possible to tell bluez the pin through this programm?
You can handle pin code request in your own code following the way that hcid uses. BTW, what brand of Embedded Arm Chip support 2.6.17-3? I have never seen such a embedded arm vendor.
Quoted 9 lines
One little other problem:
I have many clients, and I want that only one connection at a time can be established, but when one client is talking to the server, the next client can establish it (connect returns 0) and can send the data, but I don't know who receives the data
Is it possible to reject the connection from the server if he is dealing already a client?
What if you close the main socket(the listening one) after accpting one client?
Signature · 11 lines
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